The Relation between Light-Curves and Luminosities of Novae

A few years ago the writer 1 discussed available data on luminosities of novae.It was found that their mean absolute magnitude at maximum is close to -7.0, and that slow novae average approximately two magnitudes fainter than fast novae.Enough additional accurate determinations are now available to justify a preliminary attempt to define the relation between rate of decline and luminosity. DATA FROM RATES OF NEBULAR EXPANSIONAngular rates of expansion of nebular shells, coupled with spectrographically observed velocities of the gases, furnish by